Aug 28 – 31, 2018
EPFL
Europe/Zurich timezone

【804】 Imaging scale-invariant antiferromagnetic textures in a nickel oxide

Aug 29, 2018, 2:30 PM
15m
CE 1 (EPFL)

CE 1

EPFL

Talk Magnetism and Spintronics at the Nanoscale Magnetism and Spintronics at the Nanoscale

Speaker

Jonathan Pelliciari (MIT)

Description

Correlated electron systems display electronically ordered ground states often intrinsically segregated at the nano/mesoscale. Antiferromagnetic order is a common instability of these materials potentially showing spatial inhomogeneity. I will present our recent result using a resonant soft X-ray scattering nanoprobe to image the bulk magnetic landscape in NdNiO3 thin films. Our measurements provide direct evidence for a highly textured magnetic fabric, that further exhibits return memory effects across the Neel transition. The scale-free distribution of antiferromagnetic domains and its non-integral dimensionality, together reveal a magnetic fractal geometry near criticality, which reflects the interplay between electronic correlations and an intrinsic local parameter. Our observations expose new essential details of the nanoscale structure of nickelates.

Primary authors

Jonathan Pelliciari (MIT) Jiarui Li (MIT) Claudio Mazzoli (BNL) Sara Catalano (University of Geneva) Forrest Simmons (Purdue University) Marta Gibert (University of Geneva) Erica Carlson (Purdue University) Jean-Marc Triscone (University of Geneva) Stuart Wilkins (BNL) Riccardo Comin (MIT)

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